1. Exposures to institutions for which a credit assessment by a nominated ECAI is available shall be risk-weighted in accordance with Article 120. Exposures to institutions for which a credit assessment by a nominated ECAI is not available shall be risk-weighted in accordance with Article 121.
2. Exposures to institutions of a residual maturity of three months or less denominated and funded in the national currency of the borrower shall be assigned a risk weight that is one category less favourable than the preferential risk weight, as described in Article 114(4) to (7), assigned to exposures to the central government in which the institution is incorporated.
3. No exposures with a residual maturity of three months or less denominated and funded in the national currency of the borrower shall be assigned a risk weight less than 20 %.
4. Exposure to an institution in the form of minimum reserves required by the ECB or by the central bank of a Member State to be held by an institution may
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